<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>权限管理</el-breadcrumb-item>
          <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片区域 -->
        <el-card>
            <!-- 添加角色按钮 -->
            <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
            <!-- 列表区域 -->
            <el-table :data="rolesList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template v-slot="scope">
                        <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom',i1 === 0 ? 'bdtop' : '' ,'vcenter']" closable @close="removeRightById(scope.row, item1.id)"> 
                            <!-- 渲染一级权限 -->
                            <el-col :span="5" >
                                <el-tag>{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环 渲染嵌套二级权限 -->
                            <el-row v-for="(item2, i2) in scope.row.children" :key="item2.id" :class="[i2 === 0 ? '' : 'bdtop' ,'vcenter']" closable @close="removeRightById(scope.row, item2.id)">
                              <el-col :span="6">
                                  <el-tag type="success">{{item2.authName}}</el-tag>
                                  <i class="el-icon-caret-right"></i>
                              </el-col>
                                <!-- 通过for循环 渲染嵌套二级权限 -->
                              <el-col :span="18">
                                  <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" :class="[i3 === 999 ?  '':'']" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                              </el-col>
                            </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作">
                    <template v-slot="scope">
                  <!-- 修改按钮 -->
                  <el-tooltip effect="dark" content="修改角色" placement="top" :enterable="false">
                  <el-button type="primary" icon="el-icon-edit" size="small" @click="showRoleEditDialog(scope.row.id)">编辑</el-button>
                  </el-tooltip>
                  <!-- 删除按钮 -->
                  <el-tooltip effect="dark" content="删除角色" placement="top" :enterable="false">
                  <el-button type="danger" icon="el-icon-delete" size="small" @click="removeRoleById(scope.row.id)">删除</el-button>
                  </el-tooltip>
                  <!-- 分配按钮 -->
                  <el-tooltip effect="dark" content="分配权限" placement="top" :enterable="false">
                  <el-button type="warning" icon="el-icon-setting" size="small" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                  </el-tooltip>
                </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed" > 
            <!--  树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" :default-expand-all="true" :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 添加角色对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%" @close="setAddRoleDialogClosed" > 
            <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="100px" >
            <el-form-item label="角色名称" prop="roleName">
                 <el-input v-model="addRoleForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                 <el-input v-model="addRoleForm.roleDesc"></el-input>
            </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 编辑角色对话框 -->
        <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="50%" @close="setEditRoleDialogClosed" > 
            <el-form :model="editRoleForm" :rules="editRoleFormRules" ref="editRoleFormRef" label-width="100px" >
            <el-form-item label="角色名称">
                 <el-input v-model="editRoleForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述">
                 <el-input v-model="editRoleForm.roleDesc"></el-input>
            </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            //所有角色列表数据
            rolesList: [],
            //控制分配权限对话框的显示与隐藏
            setRightDialogVisible : false ,
            //控制添加角色对话框的显示与隐藏
            addRoleDialogVisible : false,
            //控制编辑角色对话框的显示与隐藏
            editRoleDialogVisible : false,
            //所有权限的数据
            rightsList: [],
            //树形控件的属性绑定对象
            treeProps:{
                label: 'authName',
                children:'children'
            },
            // 默认选中节点ID值数组
            defKeys: [],
            //当前即将分配权限的ID
            roleId: '',
            //添加角色的表单数据
            addRoleForm:{
            roleName: '', //角色名称    
            roleDesc: '', //角色描述
            },
            //编辑角色的表单数据
            editRoleForm:{
            },
            //添加角色表单验证规则对象
            addRoleFormRules:{
                roleName:[ 
                    { required: true, message: '请输入角色名称', trigger:'blur'},
                    {min: 2, max: 8, message: '角色名称长度在2~8个字符之间', trigger:'blur'},
                ],
                roleDesc:[ 
                    { required: false, message: '请输入角色描述', trigger:'blur'},
                    {min: 2, max: 8, message: '角色描述长度在2~8个字符之间', trigger:'blur'},
                ],
            },
            //编辑角色表单验证规则对象
            editRoleFormRules:{
                roleName:[ 
                    { required: true, message: '请输入角色名称', trigger:'blur'},
                    {min: 2, max: 8, message: '角色名称长度在2~8个字符之间', trigger:'blur'},
                ],
                roleDesc:[ 
                    { required: false, message: '请输入角色描述', trigger:'blur'},
                    {min: 2, max: 8, message: '角色描述长度在2~8个字符之间', trigger:'blur'},
                ],
            },
        }
    },

    created(){
        this.getRolesList()
    },

    methods: {
        //获取所有角色列表
        async getRolesList(){
            const { data:res } = await this.$http.get('roles')
        
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败!')
            }
            this.rolesList = res.data
        },

        //根据ID删除对应权限
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将删除角色该权限，是否继续？','提示',{
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)

            if(confirmResult !== 'confirm'){
                return this.$message.info('取消删除')
            }
            
            const { data:res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200 ){
                return this.$message.error('删除权限失败!')
            }
            //this.getRolesList()
            role.children = res.data
            
        },

        //展示分配权限对话框
        async showSetRightDialog(role){
                this.roleId = role.id
            //获取所有权限的数据
            const { data:res } = await this.$http.get('rights/tree')
            if(res.meta.status !==200){
                return this.$message.error('获取权限数据失败!')
            }
            this.rightsList = res.data

            //递归获取三级节点ID
            this.getLeafKeys(role, this.defKeys)
                this.setRightDialogVisible = true
        },

        //递归获取角色下所有的三级权限ID，并保存到defKeys数组中
        getLeafKeys(node,arr){
            if(!node.children){
                return arr.push(node.id)
            }

            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        
        //监听分配权限对话框关闭事件 清空数组
        setRightDialogClosed(){
            this.defKeys = []
        },

        //点击为角色分配权限
        async allotRights(){
            const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
            ]

            const idStr = keys.join(',')
            const { data:res } = await this.$http.post(`roles/${this.roleId}/rights`,{ rids : idStr})
            if(res.meta.status !== 200 ){
                return this.$message.error('分配权限失败！')
            }
            this.$message.success('分配角色权限成功！')
            this.getRolesList()
            this.setRightDialogVisible = false
        },

        //点击确定添加角色
        addRole(){
         this.$refs.addRoleFormRef.validate(async vaild => {
          console.log(vaild)
          if(!vaild) return
          //可以发起添加用户的网络请求
          const {data: res } = await this.$http.post('roles', this.addRoleForm)
          if(res.meta.data !== 201 ){
            this.$message.error('添加角色失败! ')
          }
          this.$message.success('添加角色成功! ')
          //成功后隐藏对话框
          this.addRoleDialogVisible = false  
          //成功后刷新列表
          this.getRolesList()
         })
        },

        //监听添加角色对话框关闭事件
        setAddRoleDialogClosed(){
            this.$refs.addRoleFormRef.resetFields()
        },

        //点击删除删除角色
        async removeRoleById(id){
            const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }
            ).catch(err => err ) 
            if (confirmResult !== 'confirm') {
            return this.$message.info('已取消删除')
            }

            const {data:res} = await this.$http.delete('roles/' + id)
            if(res.meta.status !== 200){
            return this.$message.error('删除失败！')
            }
            this.$message.success('删除角色成功！')
            this.getRolesList()
        },

        //编辑角色信息对话框
        async showRoleEditDialog(id) {
            //console.log(id)
            const {data: res } = await this.$http.get('roles/' + id)
            if(res.meta.status !== 200){
            return this.$message.error('查询角色信息失败')
            }
            this.editRoleForm = res.data
            this.editRoleDialogVisible = true
        },

        //点击编辑编辑角色
        editRoleInfo(id){
            this.$refs.editRoleFormRef.validate(async valid =>{
            //console.log(valid)
            if(!valid) return
            //发起角色信息修改请求
            const {data: res} = await this.$http.put('roles/' + this.editRoleForm.roleId, { roleName: this.editRoleForm.roleName , roleDesc: this.editRoleForm.roleDesc})
            if(res.meta.status !== 200){
                //console.log(res.meta.status)
                return this.$message.error('修改角色信息失败!')
            }
            this.editRoleDialogVisible = false
            this.getRolesList()
            this.$message.success('修改角色信息成功!')
            })
        },

        //监听编辑角色对话框关闭事件
        setEditRoleDialogClosed(){
            this.$refs.editRoleFormRef.resetFields()
        },
    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
    font-size: small;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.vcenter{
    display:flex;
    align-items: center;
}
</style>